EP1308550B1 - Verfahren zum Behandeln und Desinfizieren von Wäschestücken - Google Patents

Verfahren zum Behandeln und Desinfizieren von Wäschestücken Download PDF

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Publication number
EP1308550B1
EP1308550B1 EP02023939A EP02023939A EP1308550B1 EP 1308550 B1 EP1308550 B1 EP 1308550B1 EP 02023939 A EP02023939 A EP 02023939A EP 02023939 A EP02023939 A EP 02023939A EP 1308550 B1 EP1308550 B1 EP 1308550B1
Authority
EP
European Patent Office
Prior art keywords
disinfecting
time
chamber
wash
treatment liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02023939A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1308550A3 (de
EP1308550A2 (de
Inventor
Engelbert Heinz
Wilhelm Bringewatt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Herbert Kannegiesser GmbH and Co
Original Assignee
Herbert Kannegiesser GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Herbert Kannegiesser GmbH and Co filed Critical Herbert Kannegiesser GmbH and Co
Publication of EP1308550A2 publication Critical patent/EP1308550A2/de
Publication of EP1308550A3 publication Critical patent/EP1308550A3/de
Application granted granted Critical
Publication of EP1308550B1 publication Critical patent/EP1308550B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F31/00—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies

Definitions

  • the invention relates to a method for washing and disinfecting items of laundry according to the preamble of claim 1.
  • Certain items of laundry for example those commonly referred to as "hospital laundry", must also be disinfected. Usually, the disinfection takes place during washing. If the items of laundry are washed in a continuous washing machine, the disinfection is preferably carried out in the final wash zone.
  • the disinfection conditions are prescribed in many states. In particular, the temperatures of the washing liquid and associated disinfection periods are fixed. These specifications must be adhered to.
  • the temperature of the washing liquid during disinfection also depends on whether a chemical disinfectant is added to the washing liquid. For example, it is mandatory in Germany to carry out disinfection at temperatures above 90 ° C without chemical disinfectants. At lower temperatures, which must not be less than 70 ° C, the washing liquid, a certain amount of a corresponding chemical disinfectant is added. During the entire disinfection process, the washing liquid must have the appropriate minimum temperature and, if necessary, contain disinfectant.
  • EP-A-1 096 054 a method for monitoring the aseptic properties of laundry prior to opening at least one door of a washing machine is known.
  • this method it is monitored whether a minimum temperature of a bath contained in a container has been reached. Only after a predetermined time interval has elapsed after the minimum temperature in the container has been reached, a signal is sent out which makes it possible to open the door. In this way it should be prevented that no aseptic properties containing laundry could enter a clean room and contaminate it.
  • the known method has no measures to ensure that the laundry items are treated no longer than the required time in a treatment liquid having a minimum disinfecting temperature so as to improve the economy of the treatment of the laundry items.
  • the present invention seeks to provide a method for washing and disinfecting laundry items, with which the predetermined disinfection time can be reliably maintained without additional safety times and is thus improved in terms of cost over known methods.
  • a method for solving the above-mentioned problem comprises the measures of claim 1.
  • a constant comparison of the predetermined, required treatment period with the duration of the ongoing treatment is taken into account for determining the duration of the ongoing treatment, in which the laundry items are in a treatment liquid having the minimum temperature required for disinfection.
  • periods are also taken into account in which, although no washing process takes place, disinfection takes place under the required conditions.
  • the disinfection takes place in a specific treatment zone of a continuous washing machine.
  • these are predominantly a clearwash zone of the continuous washing machine which extends over several successive treatment chambers.
  • the final wash zone is preceded by at least one heating chamber, in which the treatment chamber is heated to the prescribed disinfection temperature, with which washing and simultaneous disinfection of the laundry items takes place in the subsequent final wash zone.
  • the treatment liquid may have corresponding additives, in particular at least one chemical disinfectant, to reduce the temperature required for disinfection.
  • the inventive method already allows to count a period of time to the predetermined disinfection time in which the laundry items are still in the heating chamber, as soon as the treatment liquid has reached the minimum temperature required for disinfection and an optionally required disinfectant of the treatment liquid has been added ,
  • the transfer time periods are also counted as the disinfection time. It is preferably all transfer times of one Treatment chamber or wash chamber to the other and taken into account by the heating chamber to the first wash chamber. This also makes the process of the invention more economical.
  • the treatment liquid from the last treatment chamber, in particular final wash chamber only then drained as soon as the prescribed disinfection time (exactly) reached or expired. It will thus be ensured that disinfection will actually take place during the disinfecting period under the prescribed and prescribed conditions.
  • the treatment liquid is discharged only when the disinfection time is over, it is possible to perform in this treatment chamber required for the exact achievement of the disinfection time aftertreatment.
  • Such post-treatment is only required if the sum of the time duration of all transfer operations is less than the sum of all average transfer time periods assumed on the basis of empirical values.
  • the clear wash time in each final wash chamber is calculated during the disinfection taking place, starting from the prescribed disinfection period until the treatment liquid from the last final wash chamber is removed, in which the average times of all transfer operations, the period of time which the items of laundry in the heating chamber already have, are determined by the prescribed disinfection period to the prescribed temperature of heated treatment liquid have been withdrawn. Subsequently, the remaining time of the disinfection period is divided by the number of final wash chambers. This results in the final wash and at the same time disinfecting period of the laundry items in the respective final wash chamber. This ensures that all periods of proper disinfection of the laundry are taken into account as the disinfection time and the disinfectant time is strictly adhered to, without disinfecting beyond the prescribed time.
  • FIGURE of the drawing shows a schematic side view of a continuous washing machine 10, also referred to as a post washing machine.
  • the continuous washing machine 10 shown is used for washing and optionally also after-treatment of laundry items in commercial laundries.
  • Such items of laundry which must be sterile, for example hospital laundry, can be disinfected simultaneously in the continuous washing machine 10.
  • other items of laundry can only be washed by appropriate program selection and optionally post-treated.
  • the continuous washing machine 10 has an elongated drum 12 with a cylindrical drum shell.
  • the drum 12 is rotationally driven about a horizontal longitudinal central axis 13.
  • the drum 12 is reciprocally driven during the treatment of the laundry items, in such a way that the drum 12 alternately performs in the direction of rotation of the pitch circle movements.
  • the invention can also be used in any other washing machines, in particular continuous washing machines with other operation than those exemplified above.
  • the drum 12 of the continuous washing machine 10 has a plurality of successive in the treatment direction 14 chambers 15, 16, 17.
  • the continuous washing machine 10 shown here has thirteen consecutive chambers 15, 16, 17.
  • the number of chambers 15, 16, 17 may be arbitrary, that is not limited to the embodiment shown in the figure.
  • the chambers 15, 16, 17 may have different internals.
  • some chambers 15, 16, 17 are surrounded by outer drums.
  • the drum 12 is further operationally divided into different zones. Individual zones may be formed by a plurality of successive chambers 15, 17.
  • the heating chamber 16 is followed by a final wash zone, which is formed in the present embodiment of five successive wash chambers 17.
  • the rinsing zone is followed in the treatment direction 14 by a rinsing zone comprising four chambers 15.
  • the last chamber of the rinsing zone can be designed as a retrofitting chamber. In this case, a finishing zone is provided at the end of the rinse zone.
  • an input funnel 19 is arranged before an input end 18 (in the figure on the left) of the drum 12. Via this input funnel 19, the laundry items to be washed pass into the drum 12 of the continuous washing machine 10, in the first chamber 15 of the prewash zone in the treatment direction 14.
  • an output chute 21 is arranged in the illustrated embodiment. Washed laundry items leaving the drum 12 via the dispensing end 20 are transported out of the continuous washing machine 10 via the discharge chute 21, optionally to a subsequent dewatering device, not shown, such as a dewatering press.
  • the invention relates to the disinfection of laundry items, in particular hospital laundry.
  • This disinfection takes place in the continuous washing machine 10, together with the washing of the laundry items.
  • the disinfection of the laundry items takes place mainly in the final wash zone, in all chambers of the final wash zone. In the exemplary embodiment shown, these are the five successive wash chambers 17.
  • the treatment liquid Prior to the final wash zone, namely in the heating chamber 16 arranged between the prewash zone and the final wash zone, the treatment liquid is heated from the lower temperature in the prewashing zone to the higher disinfection temperature.
  • drained treatment liquid in the heating chamber 16 either in the so-called Einbadphal at the end of the final wash zone drained treatment liquid can be heated to at least the disinfection temperature or it is heated in the so-called two-bath process after a bath change colder treatment liquid accordingly.
  • the treatment liquid is at least partially discharged from the final wash chamber 17, wherein in the single bath the drained treatment liquid is transported in the circulation to the heating chamber 16, while in the two-bath process in the last Clearwashing 17 derived treatment liquid is otherwise reused, for example, in the prewash zone or in a sewer is passed.
  • Disinfection is carried out in compliance with legal or regulatory requirements. Thus, for example, it is prescribed (in Germany) to carry out the disinfection of the laundry items for ten minutes in a treatment liquid having a temperature of at least 90 ° C. when working without disinfectant. When disinfectants are used, disinfection also takes place over a period of ten minutes, but in a treatment liquid that only needs to have at least 70 ° C.
  • the heating of the treatment liquid in the heating chamber 16 to 70 ° C requires an average of forty seconds in Einbad psychologist.
  • the treatment liquid in the heating chamber 16 must be heated for an average of sixty-five seconds to reach a temperature of 70 ° C.
  • the laundry items in the respective final wash chamber 17 must remain for a longer time, so that at the end of the wash zone the laundry over the prescribed period of ten minutes of disinfection with at least 70 ° C warm treatment liquid (chemothermal disinfection with the addition of a chemical disinfectant). Because of this, the laundry items are also already disinfected for a certain period of time in the heating chamber 16 in heated to 70 ° C treatment liquid.
  • all periods during which a transfer of the laundry items, namely each laundry item, from the heating chamber 16 to the first final wash chamber 17 and within the final wash zone to the next final wash chamber 17 are taken into account in determining the disinfection time.
  • the respective Wäschepostens is interrupted, but there is a disinfection instead, because the laundry items during the transfer in the at least 70 ° C or 90 ° C warm Treatment liquid are located.
  • the disinfection times in the individual wash chambers 17 can accordingly be correspondingly lower.
  • the respective same cycle time in the individual wash chambers 17 is calculated as follows: From the prescribed disinfection time (ten minutes), the time that the laundry items are still in the heating chamber 16 is first subtracted After the treatment liquid has been heated in the same to the required temperature of 70 ° C and 90 ° C, respectively. From the remaining period of time then the total time of all (five in the embodiment shown) transfer operations is deducted. Since the transfer time can vary depending on the drum position at the initiation of the transfer process, average transfer times are expected. Such an average transfer time is expedient because experience has shown that the five transfer processes during the clear wash take different lengths of time, resulting in an average transfer time.
  • this time (for example fifteen seconds) is taken into account so that the discharge time of the treatment liquid in the last final wash chamber 17 is determined when determining the disinfection period not included. Accordingly, the disinfecting period of, for example, ten minutes must be reached at the time of starting the discharge of the treating liquid from the last final wash chamber 17.
  • the time of the disinfection process missing in such a case is made up, so to speak, by subsequently draining the treatment liquid later in the final wash chamber 17, thus reducing the treatment in the Last clear wash chamber 17 is carried out until the predetermined disinfection period is reached.
  • the controller of the continuous washing machine 10 has a time detection means, preferably a so-called timer.
  • the timer records the actual disinfection duration of the respective laundry item.
  • the timer has reached a period of time corresponding to the prescribed disinfecting period for each batch of laundry, the disinfecting operation can be stopped by draining the treating liquid in the last final washing chamber 17.
  • the timer has usually reached the intended disinfection time when the previously determined cycle time in the last wash chamber 17 to Start of draining the treatment liquid (water) has expired.
  • the timer is started by a temperature sensor in the heating chamber 16.
  • the temperature sensor detects the instantaneous temperature of the treatment liquid to be heated. If this has reached the previous temperature of 70 ° C or 90 ° C and in the case of the required addition of a chemical disinfectant this has been added to the treatment liquid, the timer begins to count the disinfection time of each batch of laundry.
  • the timer first determines the time that the laundry item is in the heating chamber 16 in the presence of the disinfecting conditions, namely temperature and optionally the presence of a chemical disinfectant additive.
  • the remaining disinfection period is determined and from this, with the deduction of the average times of all transfer operations and the time for discharging the treatment liquid from the last wash chamber 17, the respective same cycle time in FIG the respective final wash chamber 17 calculated.
  • the timer monitors whether at the end of the clear wash in the last final wash chamber 17, the required treatment time has taken place. Only when this is the case, the valve opens to drain the treatment liquid from the last wash chamber 17, whereby the disinfection process is completed.
  • the timer controls a catch-up treatment over the remaining time, during which time the Clear wash with the disinfection in the final wash chamber 17 "made up". This ensures that in each case the exactly prescribed disinfection period is adhered to.
  • the disinfection period can be maintained by the method according to the invention in a matter of seconds, whereby it is not necessary, for safety's sake, to carry out the disinfection longer than prescribed, whereby the inventive method for disinfecting the laundry with the greatest possible efficiency is feasible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)
EP02023939A 2001-11-01 2002-10-25 Verfahren zum Behandeln und Desinfizieren von Wäschestücken Expired - Lifetime EP1308550B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10154982 2001-11-01
DE10154982A DE10154982A1 (de) 2001-11-01 2001-11-01 Verfahren zum Behandeln, insbesondere Desinfizieren von Wäschestücken

Publications (3)

Publication Number Publication Date
EP1308550A2 EP1308550A2 (de) 2003-05-07
EP1308550A3 EP1308550A3 (de) 2004-05-19
EP1308550B1 true EP1308550B1 (de) 2006-05-24

Family

ID=7705122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02023939A Expired - Lifetime EP1308550B1 (de) 2001-11-01 2002-10-25 Verfahren zum Behandeln und Desinfizieren von Wäschestücken

Country Status (5)

Country Link
EP (1) EP1308550B1 (da)
AT (1) ATE327363T1 (da)
DE (2) DE10154982A1 (da)
DK (1) DK1308550T3 (da)
ES (1) ES2266383T3 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202021107030U1 (de) 2021-12-22 2022-02-04 MAXI-PRESS Elastomertechnik GmbH Dichtung zur Abdichtung zweier benachbarter, Behandlungskammern aufweisende Segmente einer Waschanlage

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1118935B (de) * 1959-07-10 1961-12-07 Muenchner Medizin Mechanik Elektrische Programmsteuerung fuer selbsttaetig nacheinander ablaufende Programmphasen fuer Sterilisierapparate
DD143557A1 (de) * 1979-03-22 1980-09-03 Bergmann Hans Joachim Transportabler steuerautomat fuer hitzesterilisation
NZ193067A (en) * 1979-06-05 1983-05-31 American Sterilizer Co Programmable sterilising apparatus
DD233488A1 (de) * 1985-01-03 1986-03-05 Mini Nat Verteidigung Automatisches steuer- und kontrollgeraet fuer heissluftsterilisatoren
DD244493A1 (de) * 1985-12-20 1987-04-08 Liebknecht Mikroelektron Schaltungsanordnung fuer die externe ueberwachung von heissluftsterilisatoren
DE19609994C1 (de) * 1996-03-14 1997-09-18 Henkel Ecolab Gmbh & Co Ohg Verfahren zum Betreiben von im Gegenstrom arbeitenden Waschstraßen und Gegenstromwaschanlagen
DE29802948U1 (de) * 1998-02-19 1998-10-29 Karl Leibinger Medizintechnik GmbH & Co. KG, 78570 Mühlheim Sterilisationscontainer
FR2800397B1 (fr) * 1999-10-27 2002-01-18 Electrolux Syst Blanchisserie Procede de controle du caractere aseptique du linge avant l'ouverture d'au moins une porte de machine a laver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202021107030U1 (de) 2021-12-22 2022-02-04 MAXI-PRESS Elastomertechnik GmbH Dichtung zur Abdichtung zweier benachbarter, Behandlungskammern aufweisende Segmente einer Waschanlage

Also Published As

Publication number Publication date
DE10154982A1 (de) 2003-05-22
DE50206870D1 (de) 2006-06-29
DK1308550T3 (da) 2006-09-11
EP1308550A3 (de) 2004-05-19
ES2266383T3 (es) 2007-03-01
ATE327363T1 (de) 2006-06-15
EP1308550A2 (de) 2003-05-07

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